package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);//后绪步骤实现

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        //获取口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    //分页
    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {

        //开启分页插件
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.page(dishPageQueryDTO);//后绪步骤实现

//        PageResult pageResult = new PageResult();
//
//        pageResult.setTotal();
//        pageResult.setRecords();

        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public DishVO selectId(Long id) {
        //根据id查询菜品数据
        Dish select = dishMapper.select(id);

        //根据菜品id查询口味
        List<DishFlavor> flavors =  dishFlavorMapper.selectFlavor(id);

        //将查询的数据封装vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(select,dishVO);

        return  dishVO ;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        //把数据复制到 dish
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本信息
        dishMapper.update(dish);
        //先删除原有口味信息 重新插入口味 口味n条
        dishFlavorMapper.deletByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors!=null&& flavors.size()>0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));

            dishFlavorMapper.insertBatch(flavors);
        }
    }

}
